diff --git a/code/modules/hydroponics/seed.dm b/code/modules/hydroponics/seed.dm
index b401db24f9..59911fc30c 100644
--- a/code/modules/hydroponics/seed.dm
+++ b/code/modules/hydroponics/seed.dm
@@ -233,7 +233,7 @@
 		origin_turf.visible_message("<span class='danger'>The [thrown.name] splatters against [target]!</span>")
 		del(thrown)
 
-/datum/seed/proc/handle_environment(var/turf/current_turf, var/datum/gas_mixture/environment, var/check_only)
+/datum/seed/proc/handle_environment(var/turf/current_turf, var/datum/gas_mixture/environment, var/light_supplied, var/check_only)
 
 	var/health_change = 0
 	// Handle gas consumption.
@@ -261,17 +261,18 @@
 	// Handle gas production.
 	if(exude_gasses && exude_gasses.len && !check_only)
 		for(var/gas in exude_gasses)
-			environment.adjust_gas(gas, max(1,round((exude_gasses[gas]*get_trait(TRAIT_POTENCY))/exude_gasses.len)))
+			environment.adjust_gas(gas, max(1,round((exude_gasses[gas]*(get_trait(TRAIT_POTENCY)/5))/exude_gasses.len)))
 
 	// Handle light requirements.
-	var/area/A = get_area(current_turf)
-	if(A)
-		var/light_available
-		if(A.lighting_use_dynamic)
-			light_available = max(0,min(10,current_turf.lighting_lumcount)-5)
-		else
-			light_available =  5
-		if(abs(light_available - get_trait(TRAIT_IDEAL_LIGHT)) > get_trait(TRAIT_LIGHT_TOLERANCE))
+	if(!light_supplied)
+		var/area/A = get_area(current_turf)
+		if(A)
+			if(A.lighting_use_dynamic)
+				light_supplied = max(0,min(10,current_turf.lighting_lumcount)-5)
+			else
+				light_supplied =  5
+	if(light_supplied)
+		if(abs(light_supplied - get_trait(TRAIT_IDEAL_LIGHT)) > get_trait(TRAIT_LIGHT_TOLERANCE))
 			health_change += rand(1,3) * HYDRO_SPEED_MULTIPLIER
 
 	return health_change
diff --git a/code/modules/hydroponics/spreading/spreading_growth.dm b/code/modules/hydroponics/spreading/spreading_growth.dm
index 63db3e6799..2b3c6b85cd 100644
--- a/code/modules/hydroponics/spreading/spreading_growth.dm
+++ b/code/modules/hydroponics/spreading/spreading_growth.dm
@@ -30,7 +30,7 @@
 	// Handle life.
 	var/turf/simulated/T = get_turf(src)
 	if(istype(T))
-		health -= seed.handle_environment(T, T.return_air(),1)
+		health -= seed.handle_environment(T,T.return_air(),null,1)
 	if(health < max_health)
 		health += rand(3,5)
 		refresh_icon()
diff --git a/code/modules/hydroponics/trays/tray.dm b/code/modules/hydroponics/trays/tray.dm
index 85ff118868..968d707472 100644
--- a/code/modules/hydroponics/trays/tray.dm
+++ b/code/modules/hydroponics/trays/tray.dm
@@ -27,6 +27,7 @@
 	var/mutation_mod = 0       // Modifier to mutation chance
 	var/toxins = 0             // Toxicity in the tray?
 	var/mutation_level = 0     // When it hits 100, the plant mutates.
+	var/tray_light = 1         // Supplied lighting.
 
 	// Mechanical concerns.
 	var/health = 0             // Plant health.
@@ -350,6 +351,14 @@
 	return
 
 /obj/machinery/portable_atmospherics/hydroponics/verb/set_light()
+	set name = "Set Light"
+	set category = "Object"
+	set src in view(1)
+
+	var/new_light = input("Specify a light level.") as null|anything in list(0,1,2,3,4,5,6,7,8,9,10)
+	if(new_light)
+		tray_light = new_light
+		usr << "You set the tray to a light level of [tray_light] lumens."
 
 /obj/machinery/portable_atmospherics/hydroponics/proc/check_level_sanity()
 	//Make sure various values are sane.
diff --git a/code/modules/hydroponics/trays/tray_process.dm b/code/modules/hydroponics/trays/tray_process.dm
index f1199c780d..280ce9e6d6 100644
--- a/code/modules/hydroponics/trays/tray_process.dm
+++ b/code/modules/hydroponics/trays/tray_process.dm
@@ -60,7 +60,6 @@
 
 	// Check that pressure, heat and light are all within bounds.
 	// First, handle an open system or an unconnected closed system.
-
 	var/turf/T = loc
 	var/datum/gas_mixture/environment
 	// If we're closed, take from our internal sources.
@@ -71,7 +70,10 @@
 	if(!environment) return
 
 	// Seed datum handles gasses, light and pressure.
-	health -= seed.handle_environment(T,environment)
+	if(mechanical && closed_system)
+		health -= seed.handle_environment(T,environment,tray_light)
+	else
+		health -= seed.handle_environment(T,environment)
 
 	// If we're attached to a pipenet, then we should let the pipenet know we might have modified some gasses
 	if (closed_system && connected_port)
diff --git a/code/modules/hydroponics/trays/tray_soil.dm b/code/modules/hydroponics/trays/tray_soil.dm
index d3a82ba383..ff8e3e23df 100644
--- a/code/modules/hydroponics/trays/tray_soil.dm
+++ b/code/modules/hydroponics/trays/tray_soil.dm
@@ -4,6 +4,7 @@
 	density = 0
 	use_power = 0
 	mechanical = 0
+	tray_light = 0
 
 /obj/machinery/portable_atmospherics/hydroponics/soil/attackby(var/obj/item/O as obj, var/mob/user as mob)
 	if(istype(O,/obj/item/weapon/tank))
@@ -15,6 +16,7 @@
 	..()
 	verbs -= /obj/machinery/portable_atmospherics/hydroponics/verb/close_lid_verb
 	verbs -= /obj/machinery/portable_atmospherics/hydroponics/verb/remove_label
+	verbs -= /obj/machinery/portable_atmospherics/hydroponics/verb/set_light
 
 /obj/machinery/portable_atmospherics/hydroponics/soil/CanPass()
 	return 1